Problem 438, “Find All Anagrams in a String,” is a common coding problem that can be solved using the sliding window technique and frequency counting. The goal is to find all the starting indices of anagrams of a shorter string (pattern) within a longer string.
Here’s a step-by-step explanation of the problem:
Problem Statement: Given two strings, s (the longer string) and p (the shorter string), find all the starting indices of anagrams of p in s.
An anagram is a word or phrase formed by rearranging the letters of another, typically using all the original letters exactly once.
Example:
Input: s = "cbaebabacd", p = "abc" Output: [0, 6]
Explanation: In the given example, “abc” is the shorter string (pattern), and it forms an anagram of “cbaebabacd” starting at indices 0 and 6.